New transom wood - how to hold in place

[SECF3114M73J]

abl1111,you're right about the keel rotting.The water that got in from your limber hole not being sealed is most likely fresh water. Fresh water causes dry rot, salt water doesn't. My transom was wet with salt water,the guy that did the repair said it probably would have lasted for another 20 years as long as no fresh water got to it.